<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <title>pvsynth</title>
    <link rel="stylesheet" type="text/css" href="csound.css" />
    <meta name="generator" content="DocBook XSL Stylesheets V1.78.1" />
    <link rel="home" href="index.html" title="The Canonical Csound Reference Manual" />
    <link rel="up" href="OpcodesTop.html" title="Orchestra Opcodes and Operators" />
    <link rel="prev" href="pvsvoc.html" title="pvsvoc" />
    <link rel="next" href="pvswarp.html" title="pvswarp" />
  </head>
  <body>
    <div class="navheader">
      <table width="100%" summary="Navigation header">
        <tr>
          <th colspan="3" align="center">pvsynth</th>
        </tr>
        <tr>
          <td width="20%" align="left"><a accesskey="p" href="pvsvoc.html">Prev</a> </td>
          <th width="60%" align="center">Orchestra Opcodes and Operators</th>
          <td width="20%" align="right"> <a accesskey="n" href="pvswarp.html">Next</a></td>
        </tr>
      </table>
      <hr />
    </div>
    <div class="refentry">
      <a id="pvsynth"></a>
      <div class="titlepage"></div>
      <a id="IndexPvsynth" class="indexterm"></a>
      <div class="refnamediv">
        <h2>
          <span class="refentrytitle">pvsynth</span>
        </h2>
        <p>pvsynth — 
      Resynthesise using a FFT overlap-add.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp139983008"></a>
        <h2>Description</h2>
        <p>
      Resynthesise phase vocoder data (f-signal) using a FFT overlap-add.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp139984256"></a>
        <h2>Syntax</h2>
        <pre class="synopsis">ares <span class="command"><strong>pvsynth</strong></span> fsrc, [iinit]</pre>
      </div>
      <div class="refsect1">
        <a id="idp139986400"></a>
        <h2>Performance</h2>
        <p>
      <span class="emphasis"><em>ares</em></span> -- output audio signal
    </p>
        <p>
      <span class="emphasis"><em>fsrc</em></span> -- input signal
    </p>
        <p>
      <span class="emphasis"><em>iinit</em></span> -- not yet implemented.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp139989728"></a>
        <h2>Examples</h2>
        <p>
      </p>
        <div class="example">
          <a id="idp139990656"></a>
          <p class="title">
            <strong>Example 714. Example (using score-supplied f-table, assuming fsig <span class="emphasis"><em>fftsize = 1024</em></span>)</strong>
          </p>
          <div class="example-contents">
            <pre class="programlisting">
<span class="comment">; score f-table using cubic spline to define shaped peaks</span>
<span class="stamnt">f</span>1 0 513 8 0 2 1 3 0 4 1 6 0 10 1 12 0 16 1 32 0 1 0 436 0

asig    <span class="opc">buzz</span>     20000, 199, 50, 1         <span class="comment">; pulsewave source</span>
fsig    <span class="opc">pvsanal</span>  asig, 1024, 256, 1024, 0  <span class="comment">; create fsig</span>
kmod    <span class="opc">linseg</span>   0, p3/2, 1, p3/2, 0       <span class="comment">; simple control sig</span>

fsigout <span class="opc">pvsmaska</span> fsig, 2, kmod             <span class="comment">; apply weird eq to fsig</span>
aout    <span class="opc">pvsynth</span>  fsigout                   <span class="comment">; resynthesize,</span>
        <span class="opc">dispfft</span>  aout, 0.1, 1024           <span class="comment">; and view the effect</span></pre>
          </div>
        </div>
        <p><br class="example-break" />
    </p>
        <p>
      Here is an example of the pvsynth opcode. It uses the file <a class="ulink" href="examples/pvsynth.csd" target="_top"><em class="citetitle">pvsynth.csd</em></a>.

      </p>
        <div class="example">
          <a id="idp140003632"></a>
          <p class="title">
            <strong>Example 715. Example of the pvsynth opcode.</strong>
          </p>
          <div class="example-contents">
            <p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
            <pre class="programlisting">
<span class="csdtag">&lt;CsoundSynthesizer&gt;</span>
<span class="csdtag">&lt;CsOptions&gt;</span>
<span class="comment">; Select audio/midi flags here according to platform</span>
<span class="comment">; Audio out   Audio in</span>
-odac    <span class="comment">;;;RT audio I/O</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o pvsynth.wav -W ;;; for file output any platform</span>
<span class="csdtag">&lt;/CsOptions&gt;</span>
<span class="csdtag">&lt;CsInstruments&gt;</span>

<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">ksmps</span> <span class="op">=</span> 16
<span class="ohdr">nchnls</span> <span class="op">=</span> 1
<span class="ohdr">0dbfs</span> <span class="op">=</span> 1

<span class="comment">;; example written by joachim heintz 2009</span>

<span class="oblock">instr</span> 1
ifftsize	<span class="op">=</span>		1024
ioverlap	<span class="op">=</span>		ifftsize <span class="op">/</span> 4
iwinsize	<span class="op">=</span>		ifftsize
iwinshape	<span class="op">=</span>		1  <span class="comment">; von-Hann window</span>
Sfile		<span class="op">=</span>		"fox.wav"
ain		<span class="opc">soundin</span>	Sfile
fftin		<span class="opc">pvsanal</span>	ain, ifftsize, ioverlap, iwinsize, iwinshape<span class="comment">; fft-analysis of the audio-signal</span>
aout		<span class="opc">pvsynth</span>	fftin<span class="comment">; resynthesis</span>
		<span class="opc">out</span>		aout
<span class="oblock">endin</span>

<span class="csdtag">&lt;/CsInstruments&gt;</span>
<span class="csdtag">&lt;CsScore&gt;</span>
<span class="stamnt">i</span> 1 0 3
<span class="stamnt">e</span>
<span class="csdtag">&lt;/CsScore&gt;</span>
<span class="csdtag">&lt;/CsoundSynthesizer&gt;</span>
</pre>
          </div>
        </div>
        <p><br class="example-break" />
    </p>
      </div>
      <div class="refsect1">
        <a id="idp140007920"></a>
        <h2>See Also</h2>
        <p>
      <a class="link" href="pvsanal.html" title="pvsanal"><em class="citetitle">pvsanal</em></a>,
      <a class="link" href="pvsadsyn.html" title="pvsadsyn"><em class="citetitle">pvsadsyn</em></a>
    </p>
      </div>
      <div class="refsect1">
        <a id="idp140010928"></a>
        <h2>Credits</h2>
        <p>
      </p>
        <table border="0" summary="Simple list" class="simplelist">
          <tr>
            <td>Author: Richard Dobson</td>
          </tr>
          <tr>
            <td>August 2001 </td>
          </tr>
        </table>
        <p>
    </p>
        <p>New in version 4.13</p>
        <p>February 2004. Thanks to a note from Francisco Vila, updated the example.</p>
      </div>
    </div>
    <div class="navfooter">
      <hr />
      <table width="100%" summary="Navigation footer">
        <tr>
          <td width="40%" align="left"><a accesskey="p" href="pvsvoc.html">Prev</a> </td>
          <td width="20%" align="center">
            <a accesskey="u" href="OpcodesTop.html">Up</a>
          </td>
          <td width="40%" align="right"> <a accesskey="n" href="pvswarp.html">Next</a></td>
        </tr>
        <tr>
          <td width="40%" align="left" valign="top">pvsvoc </td>
          <td width="20%" align="center">
            <a accesskey="h" href="index.html">Home</a>
          </td>
          <td width="40%" align="right" valign="top"> pvswarp</td>
        </tr>
      </table>
    </div>
  </body>
</html>
